Field Parameter Expand/Collapse for Matrix visualization

[Jihwan_Kim]

Hi, 
I am having some problem in the report when using field parameter in matrix visual.

Please correct me if I missed something from the latest update (Field parameter became GA), and please help to know if there is a way to solve this issue. 

I also attached the sample pbix file.

Thank you.

step 1. I have a unit_dimension table like below. I create field parameter and show it in the matrix visual, and the + sign is shown for users to click to expand to see unit level.

step 2. I select Unit from the slicer, which is the lower level than Country, from the same dimension table.

step 3. Third step, when I select back Country from the slicer, + sign is gone and still showing unit level. Users need to click drill-up button to see the same as step 1. image above. Before field parameter became GA, it was showing country data with + sign, but I am not sure when it started to happen like this, but we got this feedback from users recently.

[v-sdhruv]

Hi @Jihwan_Kim ,

Just wanted to check if you got a chance to review the explaination provided and whether that helped you resolve your query?

Thank You

[v-sdhruv]

Hi @Jihwan_Kim ,


As per your question, this is an expected behaviour with respect to field Parameter introduced with the GA release of field parameters as of July 2025.
Previously, if using a field parameter in an expanded matrix and switching the dimension or measuring the parameter selected, the matrix would collapse. Starting this month, efforts have been made to keep the matrix in the same state as possible. 

Refer- https://powerbi.microsoft.com/en-us/blog/power-bi-july-2025-feature-summary/#post-30545-_Toc20338869...

Hope this helps!

[v-sdhruv]

Hi @Jihwan_Kim ,

Just wanted to check if you were able to resolve the issue?
If you have found the solution, can you please share it with the community so that other members can easily find it?
Thank you

[Jihwan_Kim]

Hi,

Thank you for your message, but unfortunately, I cannot find a way to solve this yet.

I am still trying to ask and learn if there is a way to achieve this, and once I get it, I will try to share it.

Thank you.

[jaineshp]

Hey @Jihwan_Kim,

Looking at your Power BI field parameter issue with the matrix visual, this appears to be expected behavior rather than a bug. Here's what's happening and how to address it:

What's Causing This: When you switch from Country to Unit in the field parameter, Power BI drills down to show the unit level. When you switch back to Country, the visual maintains its current drill state but now shows country data at the unit level context.

Solutions:

1. Add Drill State Reset Logic:
   • Create a measure that detects field parameter changes
   • Use SELECTEDVALUE() to check current parameter selection
   • Reset drill context programmatically when parameter changes
2. Modify Field Parameter Structure:
   • Instead of using hierarchical drilling, create separate field parameters for each level
   • Use conditional logic in your measures to show appropriate granularity
3. Custom Visual Solution:
   • Consider using a custom table visual that resets its state when field parameters change
   • This gives you more control over the expand/collapse behavior
4. User Training Workaround:
   • Document this behavior for users
   • Add a text box explaining they need to use drill-up when switching back to higher levels
     
     

Quick Fix: Add a bookmark that captures the initial state and a button to "Reset View" - this is often the most practical solution for end users.

The root issue is that Power BI treats field parameter changes and drill actions as separate operations, so the visual doesn't automatically reset its drill state when parameters change.

Did it work? ✔ Give a Kudo • Mark as Solution – help others too!

Best regards,
Jainesh Poojara / Power BI Developer

[InfoMagician]

We have the same issue since the last update where the field parameters became GA and the improved expand and collapse states. In that sence t is not a bug but a new feature, but it is messing with out extended field parameters. 

So thanks for sharing these solutions. It looks like the first solution stays closest to the current setup. Can you elaborate a bit on this solution. I'm not aware of the fact that you can reset the drill context programmatically. Would appreciate additional guidance.

[jaineshp]

Hey @InfoMagician,

Great question!

You're right to be curious about this - it's not a straightforward built-in function, but rather a combination of techniques that can achieve the desired behavior.

Solution 1: Measure: -

Current Parameter Selection =
VAR CurrentParam = SELECTEDVALUE('Field Parameter'[Field Parameter Fields])
RETURN CurrentParam

Dynamic Display Measure =
VAR CurrentParam = SELECTEDVALUE('Field Parameter'[Field Parameter Fields])
VAR IsCountrySelected = CurrentParam = "Country"
VAR IsUnitSelected = CurrentParam = "Unit"
RETURN
SWITCH(
TRUE(),
IsCountrySelected, [Country Level Measure],
IsUnitSelected, [Unit Level Measure],
BLANK()
)

Solution 2: Modified Matrix: -

Dynamic Hierarchy =
VAR SelectedParam = SELECTEDVALUE('Field Parameter'[Field Parameter Fields])
VAR CountryName = SELECTEDVALUE(Geography[Country])
VAR UnitName = SELECTEDVALUE(Units[Unit])
RETURN
SWITCH(
SelectedParam,
"Country", CountryName,
"Unit", UnitName,
BLANK()
)

Start with Solution 2 (Modified Matrix Setup) as it's the most reliable and doesn't depend on drill state behavior. It gives you clean control over what displays when each parameter is selected.

Fixed? ✓ Mark it • Share it • Help others!

Best Regards,

Jainesh Poojara | Power BI Developer

[Jihwan_Kim]

Hi, 

Thank you for your suggestion, but I keep failing to implement it. 😥

If it is OK with you, it will be very much helpful if you can describe how to implement it by sharing the link of the sample file or screen shots. It will be very much appreciated, and it will save my tons of time to fix this.

Thank you.

[jaineshp]

Hey @Jihwan_Kim,

Sure, will share the .pbix file in a while.

Best Regards,
Jainesh Poojara | Power BI Developer